Camera interfaces
94
Prosilica GX Technical Manual V2.3.1
Out (1 to 4)
These signals are optically isolated and require the user to provide a high voltage
level (Isolated out power) and signal common (Isolated IO GND). Isolated out
power can be from 5 V to 24 V. An example of the functional circuit is indicated in
the diagram below.
Various isolated out power values and load values for the above circuit are
indicated in the following table. Trigger current, OUT ICC, is a function of Isolated
Out Power voltage and load resistor R.
Figure 46: Output trigger circuit
Toshiba TLP281-4GB
Toshiba TLP281-4GB consist of photo transistor, optically coupled to a GaAsP light
emitting diode and an integrated high gain photo detector. These are used for the
opto-isolated camera outputs.
Isolated Out
Power
OUT
ICC
R Load
V Load
R Power
Dissipation
T
1
T
2
T
3
T
4
5 V
8 mA
500
Ω
4.1 V
32 mW
1.5
μ
s
6.5
μ
s
2
μ
s
14
μ
s
5 V
4.8 mA
1 K
Ω
4.8 V
23 mW
1.5
μ
s
5
μ
s
17
μ
s
40
μ
s
12 V
9.2 mA
1.2 K
Ω
11.2 V
101 mW
1.5
μ
s
11.2
μ
s
2
μ
s
20
μ
s
12 V
4.9 mA
2.4 K
Ω
11.8 V
58 mW
1.5
μ
s
8.5
μ
s
17
μ
s
55
μ
s
Table 47: Trigger circuit values
T
4
T
2
T
3
CAMERA LOGIC SIGNAL
OUT
T
1
100K
442R
ISOLATED OUT POWER
R
ISOLATED IO GND
EXTERNAL
CAMERA INTERNAL
1
2
16
15
3.3 V CAMERA
LOGIC SIGNAL
OUT(1 to 4)
TLP281-4GB
